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June 20th, 2026 :: 12:53 pm CDT   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated June 20th at 11:54 am 
Mostly Sunny
Temperature:77°F Dew Point:57°F
Barometer:30.01 inHg Wind:N 13 Mph
Humidity:50.5% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jun 20th
Sunday
Jun 21st
Monday
Jun 22nd
Tuesday
Jun 23rd
Wednesday
Jun 24th
Mostly Sunny Thundershowers Mix of Cloud and Sun Mostly Sunny Mostly Sunny
78°F
70°F
62°F
72°F
60°F
76°F
54°F
77°F
58°F
 
 Decatur Detailed Weather Forecast  
 
Saturday, June 20th, 2026
Afternoon Temperature: 77°F
Sunny. Slight chance of a thunderstorm.
Evening Temperature: 69°F
Mostly clear. Slight chance of a thunderstorm.
Sunday, June 21st, 2026
Overnight Temperature: 62°F
A mix of clear and cloudy skies.
Morning Temperature: 65°F
Cloudy. Windy at times.
Afternoon Temperature: 67°F
Cloudy with showers. Slight chance of a thunderstorm. Windy.
Evening Temperature: 70°F
A mix of clear and cloudy skies with a few showers. Chance of a thunderstorm. Windy at times.
Monday, June 22nd, 2026
Overnight Temperature: 65°F
A mix of cloudy and clear skies with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 61°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 69°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 65°F
Mostly clear. Windy at times.
Tuesday, June 23rd, 2026
Overnight Temperature: 55°F
Clear.
Morning Temperature: 61°F
Mostly sunny.
Afternoon Temperature: 75°F
Sunny with cloudy periods.
Evening Temperature: 67°F
Clear with cloudy periods.
Wednesday, June 24th, 2026
Overnight Temperature: 59°F
Clear with cloudy periods.
Morning Temperature: 66°F
Mostly sunny.
Afternoon Temperature: 76°F
Mostly sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 69°F
Clear with a chance of showers or thundershowers.
Thursday, June 25th, 2026
Overnight Temperature: 63°F
Mostly clear with a chance of showers.
Morning Temperature: 70°F
A mix of cloud and sun with a chance of showers. Slight chance of a thunderstorm.
Afternoon Temperature: 79°F
Mostly sunny with a chance of showers. Slight chance of a thunderstorm.
Evening Temperature: 71°F
Clear with cloudy periods. Chance of a thunderstorm.
Friday, June 26th, 2026
Overnight Temperature: 61°F
Clear.
Morning Temperature: 67°F
Sunny.
Afternoon Temperature: 77°F
Mostly sunny. Slight chance of a thunderstorm.
Evening Temperature: 69°F
Mostly cloudy with a chance of showers. Slight chance of a thunderstorm.
Saturday, June 27th, 2026
Overnight Temperature: 64°F
Cloudy with rain. Windy.
Morning Temperature: 64°F
Cloudy with rain, at times heavy. Windy at times.
Afternoon Temperature: 73°F
A mix of sun and cloud with a chance of showers. Windy at times.
Evening Temperature: 67°F
Mostly clear. Windy at times.
Sunday, June 28th, 2026
Overnight Temperature: 59°F
Clear.
Morning Temperature: 65°F
Sunny.
Afternoon Temperature: 76°F
Mostly sunny.
Evening Temperature: 70°F
Clear. Slight chance of a thunderstorm.





 

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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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